Add game state functions for Zone/Subzone, Group status (Party/Raid), Loot Mode

[veechs]

What will your feature request solve?

There is currently no easy way to control Category matching based on game state. Use cases include:

• Having gear of a certain type only match while in a raid, or even in a specific zone.
• Pulling all newly acquired items into a single Group while having the master looter role (pairs with Add RecentlyChanged() #37).

Describe the solution you'd like

Add new game state rule functions such as:
Zone() / Subzone()
PlayerInGroup() for party/raid
LootMode() along with a way to determine if you’re the master looter

Describe alternatives you've considered

Setting up multiple profiles and swapping them manually is pretty much the only way to accomplish this today.

Additional context

This was originally a request by @melbaa for conditional Group hiding. That would have been significantly more work to implement, so this more expedient approach is being proposed instead.